diff --git a/changes/2991.doc.rst b/changes/2991.doc.rst
new file mode 100644
index 0000000000..828cfcdb2f
--- /dev/null
+++ b/changes/2991.doc.rst
@@ -0,0 +1 @@
+Updated the 3.0 migration guide to include the removal of "." syntax for getting group members.
diff --git a/docs/user-guide/v3_migration.rst b/docs/user-guide/v3_migration.rst
index 678a3aafb7..a6258534e4 100644
--- a/docs/user-guide/v3_migration.rst
+++ b/docs/user-guide/v3_migration.rst
@@ -117,6 +117,8 @@ The Group class
 
    - Use :func:`zarr.Group.create_array` in place of :func:`zarr.Group.create_dataset`
    - Use :func:`zarr.Group.require_array` in place of :func:`zarr.Group.require_dataset`
+3. Disallow "." syntax for getting group members. To get a member of a group named ``foo``,
+   use ``group["foo"]`` in place of ``group.foo``.
 
 The Store class
 ~~~~~~~~~~~~~~~